Electric door-opener.



M. GUETT. ELEGTRIG DOOR OPENER. APPLICATION FILED JAN. 11,1913.

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Patented 1300.15.1914.

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ATTORNEY to unlock an entrance door sra'rs rhrivr orrrcn MONROE GUETT, OF HARTFORD, CONNECTICUT, ASSIGNOR MANUFACTURING COMPANY, OF HARTFORD, CONNECTICUT,

CONNECTICUT.

ELECTRIC DOOR-OPENER' Specification of Letters Patent. Patented Dec, 15, 1914.

Application filed January 17, 1913. Serial No. 742,5211' To all whom it may concern:

Be it known that I, MONROE Gonrr, a citizen of the United States, and a resident of Hartford, in the county of Hartford and State of Connecticut, have invented certain new. and useful Improvements in Electric Door--Openers, of which the following is a specification.

This invention relates to that class of devices wherein a door is normally locked by the engagement of its bolt with a latch, the latch being movable but normally locked in engaging position with the door bolt by a member which constitutes the armature of an electromagnet, means being provided at a distance from the door for energizing the magnet to move its armature to unlock the latch and permit of the opening of the door.

Devices of this sort are commonly used stories of a building, such as an apartment house, a puslrbutton being installed in the apartment which closes the circuit from a battery to the electromagnet. The armature is usually provided with some means,

such as a spring, to restore it to its normal position as soon as the magnet is deenergized, and such action locks the latch in what may be termed its engaging position, and it is evident that a person wishing to open the door must act while the electromagnet is energized, it being of course understood that the door bolt is not operable by the knob. Since it is difficult to establish the necessary cooperation between the person operating the push button and the per son seeking entrance, it has been customary to insert a spring-pressed plunger in the door jamb, which plunger ill be pressed in against the spring when the door is closed, and normally presses the door against the latch in order that, as soon as the latch is released by the action of the electro-magnet, this spring plunger will open the door slightly. The objections to such an arrangement are obvious, since it is impossible to release the latch and still keep the door closed.

It is the object of my invention to provide means for releasing or unlocking the latch without opening the door, and an embodiment of the invention is illustrated in the drawings, in which Figure 1 is a front view of a lock set equipped with the structure of my invenfrom the upper tion, the face plate being partially broken away, Fig. 2 is. a side view of the same with one wall of the casing removed, Fig. 3 is a transverse section on the line 3-3 of Fig. 2, Figs. at and 5 are detail end views show-' ing the operation of parts of the mechanism.

teferring to the drawings-a is the face plate, 6 the casing, 0 the strike plate pivoted at (Z(Z, and normally heldin closed position by the spring e; fis a dog fulcrumed 1n the casing and engaged by the pin 9 on thepivoted strike plate 0; it is'a keeper having a main arm :2 and an angularly dis-' posed arm 3, which keeper is pivotally supported at the angle of the two arms, as indicated at z, the keeper being held in normal position by the spring 6 through the latch.

prevents the dis-engagement of the free end ofthe dog with the keeper, thus holding the strike plate in its locking position. The side of the main arm 2 of the keeper is notched as at r to permit of its passage by the end 3" of the armature when the latter is drawn down by the magnet,'under which conditions it will be evident that pressure on the latch moves the dog, and the dog moves the keeper until its free end disengages therefrom. Then the latch is free to move to release the door bolt. But'it will be evident that if the door is not opened while the magnet is energized the moment the magnet is de e'nergized the spring 2" will throw the armature up back of the main arm 2 of the keeper and lock it, thus locking the latch.

My invention resides in providing means for moving the keeper by the end of the armature the instant the magnet is energized sutficiently to draw the armature down so that its end is in registering position with the notch 4* in the keeper arm 2, and this means comprises a pair of levers, 10, 20, having a common fulcrum 30, one lever 10, having a pin 11, projecting through the face plate a and adapted to be engaged and moved by the edge of the door when it is TO THE 'HART .& A CORPORATION C1!" closed, to what may be termed. its activeposition. The other lever 20 has a finger 21 which bears against the 'front of the main arm 2 of the keeper, a spring 25 tends to cause these two levers 10, 20, to move together, but the lever. 20 is held against movement because of its engagement with the keeper arm 2 this position ofthe parts being shown in Fig. net is energized, the armature is drawn down, bringing :it into alinern'ent with the notch 4 in the keeper arm 2 and releasing the keeper; immediately the spring 25 moves the lever 20. toward the active position of the lever 10, carrying the main-arm 2 of the keeper with it by the end of the armature, this position of the-parts being indicated in Fig. 5. I The latch is now released or unlocked, and the door-can be opened at any time, but there is nothing tending to open the door and it remains closed until pulled open. As soon as thedoor is opened the lever by a separate spring or by the spring 6 is moved back to normal position; a pin 26 in the lever 10 engages the lever 20 and causes it to move with the lever 10 to normal position. Through the connections between the strike plate and the keeper the spring 6 moves the main arm 2 of the keeper back to normal position, releasing the armature which is raised by the spring up to a position back of the keeper arm 2 These devices maybe susceptible of alterations and modifications without depart- 4. .As soon as the mag- 10 is of-course released, and either ing from the spirit o f'the invention as set forth in the accompanying claims.

I claim as'my invention 1. In a device of the character'described the combination with a latch, a keeper, and operative connecting parts, a spring for operating the latch, one position to act as a stop for the keeper, and an electro-magnet adapted to operate said armature to release the keeper, of

an armature adapted inv means normally inactive butop erati've upon r the actuation of the armatureto move said keeper by said stop and hold it in released position.

2. In a device of the character described, the combination with a latch,"a keeper,and operative connecting parts, a spring for operating the latch, an armaturefiadapted in one position to act as astop for the keeper, and an. electro-magnet adapted to operate said armature to release the keeper, of a pair o'f levers adapted to moveindependently of one another, said levers and tendingto cause them to move together in one direction, one of said levershaving engaging connection with said keeper, the other lever adapted to be en gaged by a door to move it independently of the first mentioned lever and flex the P Ti i Witnesses:

A. J. BENNETT, F. BQSTOLL.

Gopies'ot this patent may be obtained for five cents each, by 'addressingtne (Commissioner or Eatents,

Washington, 10.0.

a spring "connecting MONROE GUETT. I 

